Who/oie/fao h5n1 evolution working group akc

The H5N1 viruses have now appeared in at least 53 countries on three continents and continue to infect humans as well as to evolve and diversify at an . These clades are defined as meeting the following three specific clade definition criteria developed by the WHO/OIE/FAO H5N1 Evolution Working Group. WHO-OIE-FAO, H5 Evolution Working Group. Toward a unified nomenclature system for highly pathogenic avian influenza virus (H5N1). Emerg.